Movie from 20 years ago: Dean of Students - Student 1 - Student Teacher - Student 2 - Student 3

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The movie is from '06..
Dean of Students Lee Hyuk-jae: born in '73
Student Park Jun-gyu: born in '64
Student Teacher Kim Sa-rang: born in '78
Student Ha Seok-jin: born in '82
Student Ha Dong-hoon: born in '79